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| author | Barry Song <song.bao.hua@hisilicon.com> | 2023-10-19 11:33:21 +0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-10-24 10:38:42 +0200 |
| commit | b95303e0aeaf446b65169dd4142cacdaeb7d4c8b (patch) | |
| tree | 448ae9f3ea16e3d4593686bc929c059a8b8bd9f0 /kernel/sched/sched.h | |
| parent | 5ebde09d91707a4a9bec1e3d213e3c12ffde348f (diff) | |
| download | linux-b95303e0aeaf446b65169dd4142cacdaeb7d4c8b.tar.gz linux-b95303e0aeaf446b65169dd4142cacdaeb7d4c8b.tar.bz2 linux-b95303e0aeaf446b65169dd4142cacdaeb7d4c8b.zip | |
sched: Add cpus_share_resources API
Add cpus_share_resources() API. This is the preparation for the
optimization of select_idle_cpu() on platforms with cluster scheduler
level.
On a machine with clusters cpus_share_resources() will test whether
two cpus are within the same cluster. On a non-cluster machine it
will behaves the same as cpus_share_cache(). So we use "resources"
here for cache resources.
Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Tested-and-reviewed-by: Chen Yu <yu.c.chen@intel.com>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lkml.kernel.org/r/20231019033323.54147-2-yangyicong@huawei.com
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 65cad0e5729e..998f03d02de0 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1853,6 +1853,7 @@ static inline struct sched_domain *lowest_flag_domain(int cpu, int flag) DECLARE_PER_CPU(struct sched_domain __rcu *, sd_llc); DECLARE_PER_CPU(int, sd_llc_size); DECLARE_PER_CPU(int, sd_llc_id); +DECLARE_PER_CPU(int, sd_share_id); DECLARE_PER_CPU(struct sched_domain_shared __rcu *, sd_llc_shared); DECLARE_PER_CPU(struct sched_domain __rcu *, sd_numa); DECLARE_PER_CPU(struct sched_domain __rcu *, sd_asym_packing); |